To directly answer your question.
They are the same, basically caused by manufacture wars
Winchester - 30WCF
Remington - 30-30
Winchester 44 WCF
Remington 44-40
The list goes on and on....
All designated by 1886, with the aid of the Union Metallic Cartridge Company by advertising the 44 WCF as the 44-40 for Remington.
30-30/30 WCF both originally charged with 30gr to 34gr of early bulk smokeless powder.
Metric designations can go pound sand.